M107 projectile

It used to be the standard 155 mm high explosive projectile for howitzers of the US Army and US Marine Corps, but is being superseded in the US military by the M795.

The body consists of a hollow steel shell containing high explosive (either TNT or Composition B) painted olive drab with yellow markings.

The complete projectile weighs 43.2 kg (95 lb), is 800 mm (31 in) long and contains 15.8% explosive by weight.

Modified M107 rounds with base bleed and new aerodynamics can extend this range to around 32 km (20 mi).

Despite relatively lackluster performance (Jane's describes it as having "an indifferent charge to weight ratio", "unsophisticated aerodynamic shape", "erratic fragmentation") compared to more modern high explosive rounds, it continues to be used by many countries, in particular in training exercises because of its low cost, high availability and smaller danger area than more modern designs.